Nozzle with flow adjusting function

Abstract

The utility model provides a nozzle with a flow adjusting function, a user can visually confirm the flow adjusting amount, and convenience is higher. The nozzle (100) with the flow rate adjusting function is provided with an operation part (222) for adjusting the flow rate of the discharged pressure fluid, and when a needle valve (2) inserted into a through hole of a main body (2) along with screwing is locked by a locking nut (3), the needle valve (2) is inserted into the through hole of the main body (2) along with screwing. A display unit (4), which displays the opening degree of the needle valve (2) so as to be visually confirmed by a user, is provided across the outer peripheral surface of the needle valve (2) and the end of the lock nut (3) on the second end side.

Description

TECHNICAL FIELD

[0001] The utility model relates to the nozzle with flow regulation function that can variably adjust the flow of the sprayed fluid. BACKGROUND

[0002] Conventionally, in a blow molding process of spraying pressure fluid such as air, there are two methods of adjusting the flow, one is adjusting in the fluid supply source on the upstream side and the other is adjusting in the flow path on the downstream side. Here, although the flow on the upstream side can be adjusted in a relatively large range, there is a disadvantage that the pressure loss is large, resulting in an increase in power consumption. Therefore, from the viewpoint of energy saving, flow adjustment on the downstream side is expected. For example, reference 1 shows a flow regulating nozzle which is provided with a flow regulating function on the most downstream nozzle, and the flow regulating nozzle adjusts the flow by screwing a cap-shaped nut having a fluid outlet path to a body having a fluid inlet path.

[0003] Such a conventional flow regulating nozzle adjusts the flow by screwing the cap-shaped nut to the body so as to change the relative position of both, thereby adjusting the flow. However, it is difficult for the user to quickly confirm the degree of flow regulation within the flow adjustable range based on the screwing.

[0004] In view of the above background, in the flow regulating nozzle, a flow regulating nozzle in which the user can visually confirm the flow regulation amount from the outside is sought.

[0005] PRIOR ART DOCUMENT

[0006] PATENT DOCUMENT

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 63-69566 SUMMARY

[0008] PROBLEMS TO BE SOLVED BY THE INVENTION

[0009] The technical problem of the utility model is to provide a nozzle in which the user can visually confirm the flow regulation amount and the convenience is higher.

[0010] SOLUTION TO THE PROBLEM

[0011] To solve the above problems, the nozzle with flow regulating function has a first end and a second end at both ends in the axial direction, the nozzle with flow regulating function comprises: a flow inlet, the flow inlet is opened at the first end and introduces pressure fluid; a discharge port, the discharge port is opened at the second end and discharges the pressure fluid; and a needle valve, the needle valve adjusts the flow of the pressure fluid discharged from the discharge port, the nozzle with flow regulating function is characterized by comprising: a cylindrical body, the body has a through hole, a valve flow path and a valve seat part, the through hole penetrates the body in the axial direction and forms the flow inlet, the valve flow path is formed in the through hole and communicates with the flow inlet, and the valve seat part is arranged in the valve flow path and contacts and separates the needle valve; the needle valve is inserted into the through hole of the body from the second end side with screwing, the needle valve has a valve part, an internal flow path, a communication path and an operation part, the valve part is formed at the end of the first end side and contacts and separates the valve seat part, the internal flow path forms the discharge port and extends along the axial direction from the second end to the first end, the communication path communicates the valve flow path with the internal flow path at a position closer to the second end than the valve part, and the operation part is formed at the end of the second end side and contacts and separates the valve part by rotating around the shaft; and a locking nut, the locking nut is arranged adjacent to the second end side of the body in the axial direction, locks the needle valve with the adjusted opening degree relative to the body, and a display part of the opening degree of the needle valve is arranged across the outer periphery of the needle valve and the end of the second end side in the locking nut in the locked state of the locking nut locking the needle valve, which can be visually confirmed and displayed.

[0012] In the utility model, the display part can be formed by a scale part and a scale indication part, the scale part is formed on the outer periphery of the needle valve along the axial direction, and the scale indication part is formed by the end face of the second end side in the locking nut. In this case, preferably, the display part is arranged at the first end side compared with the operation part.

[0013] In addition, in the utility model, an anti-skid part can be arranged on the outer periphery of the operation part and the outer periphery of the locking nut, and the anti-skid part is formed by alternately forming recesses and protrusions in the circumferential direction. In this case, preferably, the anti-skid part is formed by alternately forming recesses extending along the axial direction and protrusions extending along the axial direction in the circumferential direction.

[0014] Effects of the utility model

[0015] The nozzle with flow regulating function of the utility model has the display part which can display the opening of the needle valve through visual confirmation, so the user can quickly confirm the flow regulating amount through visual observation. In addition, the anti-skid part is formed on the outer circumferential surface of the operation part operated by the user and the outer circumferential surface of the locking nut part, so when the user rotates it around the shaft, the operation can be reliably and non-sliply performed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the front view of the nozzle with flow regulating function of the utility model.

[0017] Figure 2 It is the exploded perspective view of the nozzle with flow regulating function of the utility model.

[0018] Figure 3 It is the sectional view of the nozzle with flow regulating function when fully opened.

[0019] Figure 4 It is the sectional view of the nozzle with flow regulating function when fully closed.

[0020] Figure 5 It is the perspective view of the spray gun installed with the nozzle with flow regulating function of the utility model.

[0021] BRIEF DESCRIPTION OF DRAWINGS

[0022] 100 nozzle with flow regulating function

[0023] 1 main body

[0024] 11 inlet

[0025] 12 through hole

[0026] 13 valve flow path

[0027] 14 valve seat part

[0028] 15 adjusting female screw part

[0029] 16 body part

[0030] 17 mounting screw part

[0031] 18 large diameter part

[0032] 19 small diameter part

[0033] 2 needle valve

[0034] 2a valve body part

[0035] 2b nozzle part

[0036] 21 valve shaft part

[0037] 22 valve part

[0038] 23 communication path

[0039] 24 internal flow path

[0040] 25 gasket holding portion

[0041] 25a first annular protrusion

[0042] 25b second annular protrusion

[0043] 25c gasket

[0044] 26 male threaded portion

[0045] 221 discharge port

[0046] 222 operation portion

[0047] 223 first non-slip portion

[0048] 224 cap portion

[0049] 225 nozzle hole

[0050] 226 reduced diameter portion

[0051] 227 fitting portion

[0052] 3 locking nut

[0053] 31 second non-slip portion

[0054] 32 female threaded portion for locking

[0055] 4 display portion

[0056] 41 scale portion

[0057] 42 scale indicator portion

[0058] 5 spray gun DETAILED DESCRIPTION

[0059] Hereinafter, with respect to the nozzle 100 with flow rate adjustment function of the present application, a preferred embodiment is presented, and the description is made with reference to Figures 1-5 the attached drawings.

[0060] Figure 1 A front view of the nozzle 100 with flow rate adjustment function of the present application is shown, and in particular, a state in which the needle valve 2 is fully opened and locked by the locking nut 3 is shown. Although the internal structure in the nozzle 100 with flow rate adjustment function is not shown in this drawing, the overview of the present application is explained using this drawing.

[0061] The flow-regulating nozzle 100 has a first end A and a second end B at both ends in the axis L direction. A flow inlet 11 for introducing a pressure fluid is provided at the first end A, and a discharge outlet 221 for discharging the pressure fluid is provided at the second end B. Further, the flow-regulating nozzle 100 is composed of a main body 1 having the flow inlet 11, a needle valve 2 having the discharge outlet 221, and a lock nut 3 that locks the needle valve 2 at a regulated opening degree with respect to the main body 1.

[0062] The main body 1 is formed in a cylindrical shape of a metal with a through hole that penetrates in the axis L direction. Further, an outer peripheral surface of the main body 1 is provided with a body portion 16 having a hexagonal shape at the second end B side, and a mounting threaded portion 17 for mounting to a pressure flow path on the upstream side at the first end A side. An outer diameter of the body portion 16 is formed larger than an outer diameter of the mounting threaded portion 17. A valve flow path that communicates with the flow inlet 11 is provided inside the main body 1, and a valve seat portion that contacts and separates the needle valve 2 is provided in the valve flow path, and the internal configuration of the main body 1 will be described later.

[0063] The needle valve 2 is inserted into the through hole of the main body 1 from the second end B side with screwing. The discharge outlet 221, the operation portion 222, and the cap portion 224 that are a part of the needle valve 2 on the second end B side are shown in the drawing. Although not shown in the drawing, a valve portion that contacts and separates the valve seat portion of the main body 1 is provided at an end portion on the first end A side of the needle valve 2. Further, the needle valve 2 is capable of being inserted into the main body 1 in a manner that can advance and retreat by rotating the operation portion 222 formed at the end portion on the second end B side around the axis L by an operator. In addition, a first anti-slip portion 223 is formed on an outer peripheral surface of the operation portion 222 so as to be capable of being reliably rotated when a user operates, and the first anti-slip portion 223 is alternately formed with recesses and protrusions in the circumferential direction.

[0064] After the needle valve 2 is inserted into the main body 1 and the flow is regulated, the lock nut 3 locks the needle valve 2 with respect to the main body 1. The lock nut 3 is formed in a cylindrical shape, and a second anti-slip portion 31 is formed on an outer peripheral surface of the lock nut 3 by the same concave-convex processing as the operation portion 222 so as not to slip when a user rotates it.

[0065] The flow-regulating nozzle 100 is provided with a display portion 4 that displays an opening degree of the needle valve capable of being visually confirmed across the end portion on the second end B side of the needle valve 2 and the lock nut 3. Specifically, the display portion 4 is formed by a scale portion 41 formed on an outer peripheral surface of the cap portion 224 of the needle valve 2 along the axis L direction and a scale indication portion 42 that is an end surface on the second end B side of the lock nut 3. In the drawing, since the needle valve is in a fully open state, the scale indication portion 42 shows a scale corresponding to the fully open position.

[0066] As described above, the nozzle 100 with flow rate adjustment function of the present application forms a display portion 4 in a manner that the opening degree of the needle valve 2 can be visually confirmed. In addition, a first anti-slip portion 223 is formed on the outer peripheral surface of the operation portion 222 of the needle valve 2 so that the user can reliably rotate the needle valve 2, and a second anti-slip portion 31 is formed on the outer peripheral surface of the lock nut 3.

[0067] Figure 2 is an exploded perspective view of the nozzle with flow rate adjustment function of the present application. In addition, Figure 3 is a sectional view of the nozzle with flow rate adjustment function of the present application when fully open, Figure 4 is a sectional view of the nozzle with flow rate adjustment function of the present application when fully closed.

[0068] Referring to Figures 2-4 , each component is described in detail, including the internal structure.

[0069] (For the needle valve 2)

[0070] As shown in Figure 2 and Figure 3 , the needle valve 2 is composed of a valve body portion 2a and a nozzle portion 2b. Furthermore, the end portion of the second end B side of the valve body portion 2a is fitted into the fitting portion 227 of the first end side end portion of the nozzle portion 2b, and is fixedly connected in the direction around the axis L and the axis L direction.

[0071] The valve body portion 2a is a cylindrical shape made of metal, has a valve portion 22 at the end portion of the first end A side, and has a valve shaft portion 21 at a position closer to the second end side than the valve portion 22. The valve portion 22 of the needle valve 2 is formed in a truncated cone shape in which the cross-sectional area gradually decreases toward the first end A side. Furthermore, the valve portion 22 can adjust the valve opening degree in the range from full closing to full opening by contacting and separating with respect to the valve seat portion 14. Thus, the nozzle 100 with flow rate adjustment function can adjust the flow rate.

[0072] An internal flow path 24 is formed inside the valve shaft portion 21, and the internal flow path 24 forms an opening at the end surface of the second end B side. Furthermore, in the valve shaft portion 21, a communication path 23 that communicates the valve flow path 13 and the internal flow path 24 penetrates the end portion of the first end side of the valve shaft portion 21 in a direction perpendicular to the axis L direction.

[0073] Further, a gasket holding portion 25 is formed on the outer circumferential surface of the valve shaft portion 21 at a position on the second end B side from the communication passage 23. The gasket holding portion 25 is formed by a first annular protrusion 25a and a second annular protrusion 25b formed on the second end B side from the first annular protrusion 25a. Further, a gasket 25c is fitted and held in a recess formed between the first annular protrusion 25a and the second annular protrusion 25b. Further, a male screw portion 26 for screwing with the main body 1 and the lock nut 3 is provided on the outer circumferential surface of the valve shaft portion 21 at a position on the second end B side from the gasket holding portion 25. The male screw portion 26 is formed longer than the total length in the axial direction L of the adjustment female screw portion 15 of the main body 1 and the lock female screw portion 32 of the lock nut 3.

[0074] Further, the nozzle portion 2b of the needle valve 2 is cylindrical, has an operation portion 222 for rotation by a user and a cap portion 224 on the first end A side from the operation portion 222. In the operation portion 222, a nozzle hole 225 forming a discharge port 221 is formed with a fixed cross-sectional area. As described above, on the outer circumferential surface of the operation portion 222, a first anti-slip portion 223 is formed by knurling so that the user can reliably operate. Specifically, the first anti-slip portion 223 is provided by alternately forming recesses and protrusions extending in the axial direction L in the circumferential direction. Note that the configuration of the anti-slip portion is not limited to the present embodiment, and recesses and protrusions can be alternately formed in the circumferential direction by so-called knurling or the like so as not to slip when the user rotates it about the axis.

[0075] The cap portion 224 is formed with an outer diameter larger than that of the operation portion 222, has an end surface on the one end side open, and is formed with a fitting portion 227 for fitting with the valve body portion 2a while maintaining the open area. Therefore, the inner diameter of the fitting portion 227 is formed larger than the outer diameter of the end portion of the valve body portion 2a on the second end B side, so that it can be fitted and pressed in. Further, a reduced diameter portion 226 is formed on the second end B side from the fitting portion 227, and the reduced diameter portion 226 gradually decreases in cross-sectional area and communicates with the nozzle hole 225. Further, the fitting portion 227 is fitted with the end portion of the valve body portion 2a on the second end B side and communicates with the internal flow path 24 of the valve body portion 2a. Thus, the internal flow path of the needle valve 2 is formed from the communication passage 23 on the first end A side to the discharge port 221 on the second end B side.

[0076] (For the main body 1)

[0077] The main body 1 is formed in the shape of a metal cylinder and has a through hole 12 extending along the axis L. The main body 1 has a hexagonal body portion 16 and a mounting thread portion 17 for mounting in a high-pressure flow path at a position closer to the first end A than the body portion 16. The outer diameter of the body portion 16 is larger than the outer diameter of the mounting thread portion 17, and is formed to be the largest in the nozzle 100 with flow regulation function.

[0078] like Figure 4 As shown, the through hole 1 of the main body 1 has a large-diameter portion 18 forming a flow inlet 11 and a small-diameter portion 19 located on the second end B side of the large-diameter portion 18. In the large-diameter portion 18, an annular valve seat portion 14 is provided on the second end B side of the flow inlet 11, and a valve flow path 13 is formed from its upstream to downstream. Furthermore, the valve portion 22 and the connecting passage 23 of the needle valve 2 are always located within the large-diameter portion 18 throughout the fully open and fully closed range of the needle valve.

[0079] The inner diameter of the small-diameter portion 19 is smaller than that of the large-diameter portion 18, and larger than the outer diameter of the first annular protrusion 25a and the second annular protrusion 25b in the needle valve 2. Furthermore, the small-diameter portion 19 is formed such that the gasket retaining portion 25 of the needle valve 2 is always located within the small-diameter portion 19 in both fully closed and fully open states. Therefore, the gasket will not detach between the gasket 25c and the inner circumferential surface of the small-diameter portion 19, maintaining a good seal.

[0080] In addition, an adjusting female thread 15 is provided at the end of the second end side of the through hole 12 in order to engage with the male thread 26 of the needle valve 2. As a result, the needle valve 2 can be freely inserted into the body 1 as it is engaged.

[0081] Furthermore, the inner diameter of the adjusting female thread portion 15 is set to be smaller than the inner diameter of the minor diameter portion 19. Here, when the needle valve 2 is moved in the opening direction, i.e., towards the second end B, as... Figure 3 As shown, the second annular protrusion 25b of the needle valve 2 abuts against the stepped adjustment female thread portion 15 and small diameter portion 19 of the main body 1, stopping the needle valve 2. This prevents the needle valve 2 from falling off the main body 1.

[0082] (For locking nut 3)

[0083] The locking nut 3 is a cylindrical metal part with an inner diameter larger than the outer diameter of the cap portion 224. A locking female thread portion 32 is formed at the end on the first end A side to engage with the male thread portion 26 of the needle valve 2. Only the inner diameter of this locking female thread portion 32 is small, and its inner diameter is the same as the inner diameter of the adjusting female thread portion 15 of the body portion 1. The outer diameter of the locking nut 3 is smaller than the outer diameter of the body portion 16 of the main body 1.

[0084] Further, a second anti-slip portion 31 is formed on the outer peripheral surface of the lock nut 3, like the operation portion 222. Specifically, the second anti-slip portion 31 is provided by alternately forming a recess portion extending in the axis L direction and a convex portion extending in the axis L direction in the circumferential direction. Note that the shape of the anti-slip portion is not limited to the present embodiment, and a recess portion and a convex portion can be alternately formed in the circumferential direction so as not to slip when the user rotates it about the axis. Further, the shapes of the first anti-slip portion 223 and the second anti-slip portion do not need to be the same, and can be different shapes.

[0085] (For the display portion 4)

[0086] In the nozzle 100 with the flow rate adjustment function, a display portion 4 capable of visually confirming the valve opening degree of the needle valve 2 is formed across the outer peripheral surface of the needle valve 2 and the end portion of the lock nut 3 on the second end B side. In the present embodiment, the display portion 4 is formed of a scale portion 41 formed on the outer peripheral surface of the needle valve 2 in the axis L direction and a scale indication portion 42 formed by the end surface of the lock nut 3 on the second end B side. The scale portion 41 is marked with scales at fixed intervals in the axis L direction in the range from full closing to full opening of the needle valve. In the present embodiment, as shown in Figs. 5 and 6, the scales are marked in five equal parts from full closing to full opening, and six scales are marked. Here, the scale portion 41 can also be marked with numerical values corresponding to each scale. Further, since the needle valve 2 is advanced and retracted by rotation about the axis, it is preferable to provide the display portion 4 at a plurality of positions about the axis so as to be able to visually confirm the display portion at any position. In the present embodiment, although not shown, it is formed at two positions at intervals of 180 degrees about the axis. In addition thereto, for example, the display portion can be provided at intervals of 90 degrees about the axis. Further, the scales can be marked all around. Note that the display portion is not limited to the present embodiment, and can be any display portion capable of visually confirming the opening degree of the needle valve 2. For example, for the display portion, a small window can be provided on the end portion of the lock nut on the second end B side so as to be able to confirm the scales marked on the outer peripheral surface of the needle valve. Figure 1 Figure 2

[0087] Figure 4 is a cross-sectional view of the nozzle 100 with the flow rate adjustment function in the full closing state. The explanation of each component is the same as in Figure 3 , and the explanation is omitted. In the full closing state, the valve portion 22 of the needle valve 2 is in a state of abutting against the valve seat portion 14 of the main body 1. That is, the needle valve 2 is in a state of being screwed to the main body 1 on the first end A side. In this state, after being fixed by the lock nut 3, the scale indication portion 42 of the display portion 4, that is, the end surface of the lock nut 3 on the second end B side, shows the scale corresponding to the full closing of the scale portion 41, that is, a scale showing "0".

[0088] Figure 5 ​​A torch 5 is shown with the flow-regulated nozzle 100 installed. When installing, the user can turn the hexagonal portion of the body 1 by a tool, and screw the installation threaded portion 17 to the front end of the torch 5 to assemble.

[0089] Note that the present application is not limited to the above-described embodiments, and various structures can be employed within the scope of the gist of the present application.

Claims

1. A nozzle with flow regulation, having a first end and a second end at opposite ends in an axial direction, the nozzle comprising: an inlet port provided at the first end and through which a pressure fluid is introduced; an outlet port provided at the second end and through which the pressure fluid is discharged; a needle valve that regulates the flow rate of the pressure fluid discharged from the outlet port, the nozzle with the flow rate regulating function is characterized by comprising: a cylindrical main body having a through-hole, a valve flow path, and a valve seat portion, the through-hole passing through the main body in the axial direction and forming the inlet port, the valve flow path being formed in the through-hole and communicating with the inlet port, the valve seat portion being provided in the valve flow path and allowing the needle valve to contact and separate; the needle valve inserted into the through-hole of the main body from the second end side in a screwed manner, the needle valve having a valve portion, an internal flow path, a communication path, and an operation portion, the valve portion being formed at an end portion on the first end side and contacting and separating from the valve seat portion, the internal flow path forming the outlet port and extending in the axial direction from the second end toward the first end, the communication path communicating the valve flow path with the internal flow path at a position on the second end side than the valve portion, the operation portion being formed at an end portion on the second end side and contacting and separating the valve portion from the valve seat portion by rotating around the shaft; a lock nut disposed adjacent to the second end side of the main body in the axial direction and locking the needle valve at a regulated opening degree with respect to the main body, in a locked state in which the lock nut locks the needle valve, a display portion that displays the opening degree of the needle valve by visual confirmation is provided across an outer peripheral surface of the needle valve and an end portion on the second end side of the lock nut.

2. The nozzle with the flow rate regulating function according to claim 1, wherein the display portion is formed by a scale portion formed on the outer peripheral surface of the needle valve in the axial direction and a scale indication portion formed by an end surface on the second end side of the lock nut.

3. The nozzle with the flow rate regulating function according to claim 1 or 2, wherein the display portion is disposed on the first end side compared to the operation portion.

4. The nozzle with the flow rate regulating function according to claim 1 or 2, wherein an anti-slip portion is provided on an outer peripheral surface of the operation portion and an outer peripheral surface of the lock nut, the anti-slip portion being formed by alternately forming a concave portion and a convex portion in the circumferential direction.

5. The nozzle with the flow rate regulating function according to claim 4, wherein the anti-slip portion is formed by alternately forming a concave portion extending in the axial direction and a convex portion extending in the axial direction in the circumferential direction. ​

Images